Year	constant 2011 international $
1990	3742.43102430261
1991	3335.59523798289
1992	1976.52521776098
1993	1845.3142200831
1994	1992.01523895145
1995	2173.35877702752
1996	2336.51213668275
1997	2441.17949606885
1998	2639.94677079136
1999	2744.4257626029
2000	2924.74452135796
2001	3224.10745580806
2002	3669.34542509198
2003	4206.79947455511
2004	4673.81650269449
2005	5356.59645608394
2006	6110.62482273624
2007	7011.67412540552
2008	7559.92654863541
2009	6534.07715174723
2010	6702.82936989704
2011	7019.76774846004
2012	7505.12457412053
2013	7717.06096440542
2014	7954.19533052503
2015	8171.83235372945
2016	8158.63479378224
2017	8744.7313676447
2018	9177.74415910678